{"id":"CVE-2026-116187","title":"Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads","summary":"Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who le…","severity":"medium","cvss":5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-639"],"vendor":"rclone","product":"rclone","affected":["rclone >= 1.68.0 < 1.75.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-26T15:38:35.466418Z"},"published":"2026-10-25","updated":"2026-10-26","sourceUpdated":"2026-10-26T16:42:27.522Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116187","references":[{"url":"https://github.com/rclone/rclone/security/advisories/GHSA-35g6-9fjv-rmx5","label":"GitHub Security Advisory (GHSA-35g6-9fjv-rmx5)"},{"url":"https://www.vulncheck.com/advisories/rclone-1.68.0-before-1.75.2-authorization-bypass-in-serve-s3-multipart-uploads","label":"VulnCheck Advisory: Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116187.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-116187"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2560402"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116187"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116187"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00151,"epssPercentile":0.04161,"ingestedAt":"2026-10-25T22:08:29.944Z","slug":"CVE-2026-116187","body":"## Overview\n\nRclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.\n\n## Affected\n\n- `rclone >= 1.68.0 < 1.75.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Cryostat 4, Red Hat Advanced Cluster Management for Kubernetes 2 · no fix planned: Cryostat 4, Red Hat Advanced Cluster Management for Kubernetes 2 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-116187.json)","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}